Security readout for executives and security teams
Plain-English summary
CVE-2025-56537 is a stored XSS issue in OpenNebula 6.10.0.1, reportedly fixed in 7.0. An attacker could store malicious web content in a virtual network template field that executes when another user views it. Business impact is mainly session, data, or workflow compromise inside the OpenNebula web interface.
Executive priority
Treat as a near-term remediation item for OpenNebula environments, especially shared or externally reachable administration portals. It is not currently supported as actively exploited, but stored XSS in cloud management software can enable meaningful account and workflow abuse.
Technical view
The CVE describes CWE-79 stored cross-site scripting via the virtual network template parameter. CVSS 3.1 is 6.1: network reachable, low complexity, no privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Organizations running OpenNebula 6.10.0.1 are the stated exposed group. Exposure is higher where the OpenNebula web interface is reachable by many users or untrusted networks. The source bundle does not provide complete affected CPE metadata.
Exploitation context
The record does not indicate CISA KEV listing or active exploitation. A public GitHub reference exists, but the provided sources do not establish real-world exploitation. Successful impact requires a user to view the stored content in the affected interface.
Researcher notes
Evidence is concise: version 6.10.0.1 is named vulnerable and 7.0 fixed. The CVE affected-product metadata is incomplete. Avoid assuming broader version ranges without vendor confirmation. The CVSS vector confirms user interaction and no availability impact.
Mitigation direction
- Upgrade affected OpenNebula 6.10.0.1 deployments to version 7.0 or later.
- Review OpenNebula vendor guidance for any additional security advisories or upgrade notes.
- Limit access to the OpenNebula web interface to trusted administrative networks.
- Review virtual network templates for unexpected script or HTML content.
Validation and detection
- Inventory OpenNebula versions and identify any 6.10.0.1 instances.
- Confirm upgraded systems report OpenNebula 7.0 or later.
- Inspect virtual network template fields for suspicious embedded web content.
- Verify role-based access and network restrictions around the OpenNebula interface.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-56537 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://opennebula.io/opennebula-7/CVE reference
- https://github.com/MarkArtamonov/OpenNebula-CVE-2025-56537CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.